公开(公告)号：US09645076B2

公开(公告)日：2017-05-09

申请号：US14583288

申请日：2014-12-26

Applicant: General Electric Company

Inventor： Nagapriya Kavoori Sethumadhavan ,  Sandip Maity ,  Samhitha Palanganda Poonacha ,  Moitrayee Mukherjee ,  Purbasha Halder ,  Harish Sasikumar ,  Prasenjit Pandey

IPC: G01N21/25 ,  G01N21/31 ,  G01J3/433 ,  G01N21/39 ,  G01N21/03 ,  G01N21/3504

CPC classification number: G01N21/31 ,  G01J3/433 ,  G01N21/03 ,  G01N21/3504 ,  G01N21/39 ,  G01N2201/061

Abstract: A method for determining a concentration of at least one individual gas present in a gas-mixture includes irradiating a first component by incident modulated-light-beams characterized by a determined absorption wavelength range, modulation frequencies and a modulation amplitudes to generate first transmitted-light-beams, irradiating a second component, comprising a determined concentration of the at least one individual gas, by the first incident modulated-light-beams to generate second transmitted-light-beams, generating noise signals representative of a characteristic of the first transmitted-light-beams, generating noise-free signals representative of a characteristic of the second transmitted-light-beams, selecting an optimal modulation frequency and an optimal modulation amplitude from the modulation frequencies and the modulation amplitudes based on the noise signals and the noise-free signals, and determining a concentration of the at least one individual gas in the gas-mixture based on the optimal modulation frequency and the optimal modulation amplitude of the determined absorption wavelength range.

公开(公告)号：US20160187251A1

公开(公告)日：2016-06-30

申请号：US14583288

申请日：2014-12-26

Applicant: General Electric Company

Inventor： Nagapriya Kavoori Sethumadhavan ,  Sandip Maity ,  Samhitha Palanganda Poonacha ,  Moitrayee Mukherjee ,  Purbasha Halder ,  Harish Sasikumar ,  Prasenjit Pandey

IPC: G01N21/31 ,  G01N21/03

CPC classification number: G01N21/31 ,  G01J3/433 ,  G01N21/03 ,  G01N21/3504 ,  G01N21/39 ,  G01N2201/061

Abstract: A method for determining a concentration of at least one individual gas present in a gas-mixture includes irradiating a first component by incident modulated-light-beams characterized by a determined absorption wavelength range, modulation frequencies and a modulation amplitudes to generate first transmitted-light-beams, irradiating a second component, comprising a determined concentration of the at least one individual gas, by the first incident modulated-light-beams to generate second transmitted-light-beams, generating noise signals representative of a characteristic of the first transmitted-light-beams, generating noise-free signals representative of a characteristic of the second transmitted-light-beams, selecting an optimal modulation frequency and an optimal modulation amplitude from the modulation frequencies and the modulation amplitudes based on the noise signals and the noise-free signals, and determining a concentration of the at least one individual gas in the gas-mixture based on the optimal modulation frequency and the optimal modulation amplitude of the determined absorption wavelength range.

Abstract translation: 用于确定气体混合物中存在的至少一种单独气体的浓度的方法包括通过入射的调制光束照射第一分量，其特征在于确定的吸收波长范围，调制频率和调制幅度，以产生第一透射光 - 通过所述第一入射调制光束照射包含所述至少一种单独气体的确定浓度的第二组分以产生第二透射光束，产生表示所述第一透射光束的特性的噪声信号， 产生表示第二透射光束的特性的无噪声信号，基于噪声信号和无噪声从调制频率和调制幅度中选择最佳调制频率和最佳调制幅度 信号，并确定气体混合物中的至少一种单独气体的浓度 基于所确定的吸收波长范围的最佳调制频率和最佳调制幅度。